Structure–function relationship exploration for enhanced thermal stability and electro-optic activity in monolithic organic NLO chromophores
| Autor: | Kerry E. Garrett, Delwin L. Elder, Peter V. Johnston, Bruce H. Robinson, Werner Kaminsky, Ruimin Xu, Karl T. Manner, Wenwei Jin, Larry R. Dalton |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Dopant Carbazole Poling Hyperpolarizability 02 engineering and technology General Chemistry Chromophore 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Amorphous solid chemistry.chemical_compound Chemical engineering chemistry Materials Chemistry Organic chemistry Thermal stability 0210 nano-technology Glass transition |
| Zdroj: | Journal of Materials Chemistry C. 4:3119-3124 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c6tc00358c |
| Popis: | We have developed a series of novel monolithic materials based on molecules previously explored as dopants in guest–host systems to study intrinsic structure–function relationships in organic electro-optic (EO) materials. In a library of EO molecules with varied bridge segments, molecular modification of the donor with bis(tert-butyldiphenylsilyl) groups led to improvement in formation of amorphous films and led to enhanced poling efficiency. Further modification to include a carbazole site-isolation group on the bridge effectively reduced intermolecular dipole–dipole interactions, led to a material with poling efficiency of approximately 3 (nm V−1)2, and an increased glass transition temperature to 20–40 °C higher than similar reported monolithic materials. This level of thermal stability is comparable to common guest/host systems, which incorporated poly(methyl methacrylate) (PMMA) as the host. Our research showed that π-bridge length and type impacted first molecular hyperpolarizability β of a chromophore, which is accordingly reflected in the EO response. These findings further promote the utility of monolithic materials for their increased EO behavior and improved thermal stability, making this material system a competitor of guest–host systems in commercial applications. |
| Databáze: | OpenAIRE |
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